Is there a really good center in the US that prepares adults with Autism or Asperger's for jobs?

I would like to know about resources for adults (mostly ages 18-25, but any ages OK) who have Autism or Asperger's, but are too low-functioning for regular colleges & vocational schools. I know of Goodwill Industries, but are there specific vocational centers to work with this population, with specific helpful techniques? What types of vocations do adults with Autism Spectrum Disorders succeed the best in, as adults? Any advice from people experienced in this area?